/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/**
 * @author Sergey I. Salishev
 */
package org.apache.wikimark;

import java.io.IOException;
import java.io.Reader;
import java.io.Writer;

class OutputLogger extends Reader {

	private final Writer log;
	private final Reader source;
	
	OutputLogger(Writer log, Reader source) {
		this.log = log;
		this.source = source;
	}

	@Override
	public void close() throws IOException {			
		source.close();
	}

	@Override
	public int read(char[] buf, int start, int length) throws IOException {
		int res = source.read(buf, start, length);
		if (res != -1) {
			log.write(buf, start, res);
			log.flush();				
		}
		return res;
	}
	
}